Hello to the APC forum!
So I've been messing around with pyrotechnics over the summer, mainly small 2" and 3" shells, and very quickly figured out I don't like taping shells by hand. Even the 3" shells take too long for me and I hate to imagine taping larger shells by hand. To feed my impatience I spent a while building a (janky) shell taping machine. It can theoretically do between 3" to 8" shells, however I only have 3" shells working right now. It definitely needs some work and I'm probably gonna end up rebuilding it, but I'd like your guy's thoughts and opinions on it and how to make it better and if there's anything glaringly obvious wrong with it. The other big question I have is how to go about doing calculations for taping layers on the bigger shells. I got away with guesstimating on the 3" shells by wasting a lot of tape but that's not gonna fly for 4" shells and up. This machine can do angle and speed changes for all motors, just like the commercial Chinese machines. Anyway, here's some videos of the machine and a 3" shell that was made using it: